Improvement of combustion performance and emissions in a gasoline direct injection (GDI) engine by modulation of fuel volatility

Wang, Jianping; Li, Zilong; Jiang, Chenxu; He, Zhuoyao; Yu, Liang; Lü, Xingcai

doi:10.1016/j.fuel.2020.117369

Cited by 21 publications

(13 citation statements)

References 33 publications

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“…It is comprehensively used in the prior stage of engine design which involve in selection of injection strategy [35]. This is due to the ability of to provide more detailed information on in-cylinder mixture formation and spray impingement through the CFD-based engine modelling [16,22].…”

Section: Methodsmentioning

confidence: 99%

“…Computational fluid dynamic (CFD) is a powerful tool in the form of software that provides platform to investigates the fluid flow, heat transfer and some other related phenomena like chemical reactions, using its analyser tools and simulation is carried out in computer [22][23][24]. It provides a wide range of applications in various sectors where it can be applied such as in marine hydrodynamics [24], vehicles and aircrafts for aerodynamics studies (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…drag and lift), turbo machinery for the flow movement inside the diffuser and rotating access, power-plant for combustion in gas turbines and in internal combustion engines, environmental engineering for the distribution of pollutants and effluents, and many more [23]. Therefore, this special tool might assist user to improve understanding on numerical analysis and algorithm, predicting the outcomes and shorten the development time needs regarding fluid flows [22][23]. In this study, the CFD simulation is applied to investigate the results on spray characteristics of fuel at variant ambient pressure under variant conditions.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Spray Characteristics and High Ambient Pressure in Gasoline Direct Injection using Computational Fluid Dynamics

Jumadi¹,

Khalid²,

Jaat³

et al. 2020

CFDL

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Spray Characteristics and High Ambient Pressure in Gasoline Direct Injection using Computational Fluid Dynamics

Jumadi¹,

Khalid²,

Jaat³

et al. 2020

CFDL

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“…The distillation temperature at which 50% of the fuel is evaporated (T50) was the same for both fuels. This parameter is a broad indicator of warm-up and acceleration performance under cold starting conditions in internal combustion engines [75]. The lower the T50 of the fuel, the better the performance of this type of oils in engines [76].…”

Section: Physicochemical Propertiesmentioning

confidence: 99%

Fuel and Chemical Properties of Waste Tire Pyrolysis Oil Derived from a Continuous Twin-Auger Reactor

et al. 2020

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Tire pyrolysis oil (TPO) is a complex mixture of hydrocarbons, and it is one of the useful fractions obtained from the pyrolysis of waste tires (WT). As a result of its high energy density (HHV ~ 43 MJ/kg), TPO use as a fuel in combustion systems is a promising approach for recycling WT. However, fundamental fuel characteristics and combustion properties of TPO are still unexplored, which stand as a bottleneck for potential applications.This work pursues a comprehensive understanding of the structural characteristics of a TPO produced in a labscale twin-auger reactor as a first step towards defining applications and upgrading strategies. Therefore, advanced analytical techniques such as Fourier Transform -Ion Cyclotron Resonance Mass Spectrometry (FT-ICR MS), and 1 H and 13 C Nuclear Magnetic Resonance (NMR) spectroscopy were utilized. In addition, we also present the characterization of a TPO obtained from adding CaO to WT, as a low-cost catalytic material for its in-situ upgrading, herein named TPO [CaO]. FT-ICR MS results revealed the significant presence of pure hydrocarbons (HC) (HC(TPO) = 74.9 % and HC(TPO[CaO]) = 78.6 %) and hydrocarbons containing one sulfur atom (S1) (S1(TPO) = 14.3 % and S1(TPO[CaO]) = 13.9 %). HC compounds were found mainly in the form of tri-aromatics (26 %), tetra-aromatics (13 and 15 %), and penta-aromatics (22 and 30 %), while S1 compounds in the form of dibenzothiophene (31 %) and benzonaphthothiophene (34 %). The resolved compounds by means of FT-ICR 2 MS exhibited an average double bond equivalent (DBE) number of 11.3 and 12.2 for TPO and TPO[CaO], respectively. These high DBE values were indicators of the significant presence of condensed aromatic structures. 1 H NMR analysis showed that hydrogen atoms in methylene (CH2), methyl (CH3), and naphthenic groups, as well as hydrogen atoms in aromatic structures make up more than 80 % of both fuels. Similarly, carbon atoms in paraffinic groups (both CH2 and CH3) and protonated carbons in aromatic rings together form more than 50 % of the carbon atoms in TPO and TPO [CaO]. The information reported in this work provides new insights into the structural characteristics of the TPO obtained in promising technology as the twin-auger reactor for its use as a fuel, as well as for the design of upgrading strategies.

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“…Increase in the CR from 10:1 to 12:1 results in decrease of TKE by 70%; decrease of TR by 49%; increase of IMEP by 4%; increase of NOx emissions by 50% and the HC emissions are deeply reduced [1]. Deep contraction in PM and PN concentrations with FIPs up to 172 bar; further increase in FIP, the PN concentration was boosted up due to a nominal increment of nucleated fuel particles [2][3][4]. With the increase of combustion rate due to better spray atomization, the thermal efficiency of an engine increases [5].…”

Section: Introductionmentioning

confidence: 99%

Combustion chamber geometry and fuel supply system variations on fuel economy and exhaust emissions of GDI engine with EGR

Nagareddy¹,

Govindasamy²

2022

THERM SCI

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In this study, the combustion chamber geometry for spray-guided, wall-guided, and air-guided combustion strategies were fabricated. The piston crown shape and the cylinder head in each combustion chamber geometry was machined by fixing the fuel injector and spark plug at proper positions to obtain swirl, turbulence, and squish effects for better mixing of fuel with air and superior combustion of the mixture. Conducted tests on all the three modified gasoline direct injection engines with optimized exhaust gas recirculation and electronic control towards fuel injection timing, the fuel injection pressure, and the ignition timing for better the performance and emissions control. It is clear from the results that NOx emissions from all three combustion modes were reduced by 4.9% upto 50% of loads and it increase for higher loads due to increase of in-cylinder pressure. The fuel consumption and emissions showed better at 150 bar Fuel Injection Pressure for wall-guided combustion chamber geometry. Reduced HC emissions by 3.7% and 4.7%, reduced CO emissions by 2% and 3.3%, reduced Soot emissions by 6.12% and 10.6%. Reduces specific fuel consumption by about 10.3% and 13.3% in wall-guided combustion strategy compare with spray-guided and air-guided combustion modes respectively.

show abstract

Improvement of combustion performance and emissions in a gasoline direct injection (GDI) engine by modulation of fuel volatility

Cited by 21 publications

References 33 publications

Analysis of Spray Characteristics and High Ambient Pressure in Gasoline Direct Injection using Computational Fluid Dynamics

Analysis of Spray Characteristics and High Ambient Pressure in Gasoline Direct Injection using Computational Fluid Dynamics

Fuel and Chemical Properties of Waste Tire Pyrolysis Oil Derived from a Continuous Twin-Auger Reactor

Combustion chamber geometry and fuel supply system variations on fuel economy and exhaust emissions of GDI engine with EGR

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